From Utility Dive:

Recognizing both the environmental and pricing benefits from competitive wholesale markets, nine former commissioners and chairs of the Federal Energy Regulatory Commission (FERC) argued in a June 2021 letter to Congress that RTOs and ISOs “provide compelling platforms for renewable energy development and are achieving considerable consumer benefit.” According to these commissioners, “the approach FERC has championed for over two decades to ensure a well-functioning and dynamic grid is organized wholesale markets. There is no longer any doubt that these markets are reliable, resilient and highly attractive to innovative new technologies and clean energy resources.”